Scripting for Multimedia LECTURE 17: PLAYING AUDIO Audio formats - PowerPoint PPT Presentation

Scripting for Multimedia LECTURE 17: PLAYING AUDIO

Audio formats • The most common formats • Ogg/Vorbis (.oga, .ogg extension) • MP3 (.mp3 extension) • MP4 (.mp4, .mp4a, .aac extension) • WAV (.wav extension)

The <audio> elements • It is used to play audio <audio controls="controls"> <source src="song.mp3" /> You need a browser that supports HTML5! </audio>

Setting the source • The <source> element specifies an audio source • At a minimum, you need to set the src attribute to the URL of the video • There can be more than one <source> element <audio id="audio" controls="controls"> <source src="media/kittycat.oga" type='audio/ogg; codecs="vorbis"' /> <source src="media/kittycat.wav" type='audio/wav; codecs="1"' /> <source src="media/kittycat.mp3" type='audio/mpeg; codecs="mp3"' /> </audio> • The recommended order • .oga • .wav • .mp3

Configuring the <video> element • Attributes for <audio> element • autoplay • controls  Quick check • loop • preload You want to repeat the audio continuously • src when it completes. Which attribute must you set?